Kate Upton, Justin Verlander Sign Green Monster Together [PHOTOS]

Editor-in-chief of GQ Jim Nelson, model Kate Upton, and professional baseball player Justin Verlander attend the GQ Super Bowl Party 2014 sponsored by Patron Tequila, Van Heusen, and Miller Fortune on January 31, 2014 in New York City. (Photo by Dimitrios Kambouris/Getty Images for GQ)

CBS DETROIT – The lovebirds are at it again. Detroit’s favorite celebrity couple, star pitcher Justin Verlander and Sports Illustrated swimsuit model Kate Upton, posted pictures of themselves Saturday at Fenway Park, where the Detroit Tigers defeated the Boston Red Sox Friday in the first game of a three-game series.

A photo posted by Kate Upton (@kateupton) on May 17, 2014 at 10:00am PDT

Upton has evidently been enjoying Tigers games in Detroit as well. She posted Sunday about enjoying the weather in Michigan and included a photo of herself – apparently at Comerica Park – in a baseball cap featuring the old English D.

A photo posted by Kate Upton (@kateupton) on May 11, 2014 at 4:22pm PDT

Though they have not spoken publicly about their relationship, Verlander and Upton have made no secret of it. They’re frequently spotted together and tweet at each other too. Upton tagged Verlander in the following post, which suggested a combination of the stars’ names.